{"id":"3ddd561544575a82040c5537faa375476a08e2c4685eabfb0a52af9c8fd6e8c8","type":"challenge","from_addr":"poa1AhLJWDdK1ah5ZrfeCzoUy3Gzr7S3DKtss7YsSPL1Gbth","to_addr":"","amount":"","epoch":17,"ts":1793241164,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":17,"seed":"a219d76261eeb4ab","answer":"Practical: Grading requires a signature from two unrelated operators plus a random peer. A vault cannot self-grade, and the atlas must compromise independent parties, which raises the mesa cost past any farming return. The curve is the whole mechanism.","stamp":6,"from":"poa1AhLJWDdK1ah5ZrfeCzoUy3Gzr7S3DKtss7YsSPL1Gbth","nonce":7,"parents":["6b4ba0d7d7e5b3e7f0801cc4cd3f22471abb3035ed77b0c9a08e6288930bcb76","d8c9fb8ce08153aca63e18064df5fcdd3f70d4cbec1835c1033af24109c9bc6f"],"ts":1793241164,"cid":"poa-mainnet-1","sig":"4Fgocq38p3kMQbvQWRnAqohXUdZGeL974tTFGmy4KAu33cN8W1rYojBMoHqP6eS3MDDJ3XrXHMky7zZDFoyhnQ8v"},"checkpointed":{"height":137136,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T16:13:31.330Z","checkpoint_height":137136,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}